Great point that completely skipped my mind for some reason, heck did Korra and Naga even have a reunion scene? If naga was simply happy to see her I call bullshit.
I thought the last two episodes were fine, but I had a sort of empty feeling after the finale, which I think was caused by the fact that while I felt there was no closure for many of the characters, there were too many characters who were not fleshed out enough as characters, in my opinion, for me to be too annoyed about a lack of closure for them. I felt that while you had the central character of Korra, obviously, the others seemed to have two-episode stints of relevance before being shunted to the side for the five or six episodes (or longer in some cases).
Series 4, in particular, had too many characters for the amount of time they had, I believe. Don't get me wrong, however, I felt season 4 was good overall. I especially enjoyed Korra's character arc this series; Korra's journey to regain her physical abilities and confidence and accept and learn from her suffering was completed over multiple stages, arduous, and took time to occur. And as a big fan of Boardwalk Empire, I quite enjoy and am used to slow-burning storylines/character development.
I would say that it wasn't just the amount of episodes that was an issue with such a large cast, it was the size of the cast period when combined with a lack of clearly defined groupings and the weakness of feeling like you had to give air time to each and every one of them.
Ok but what do you mean by defined groupings? Wasn't it basically 'Team Avatar' versus Kuvira? Sure! But it was Korra and EVERY NAMED BENDER IN THE ENTIRE 3 PRIOR SEASONS WHO WASN'T A BAD GUY versus Kuvira and Bataar + Army. Part of the problem with that though was within
KAENVITE3PSWWABG was that they all fell into groups that had if ever so slightly different functions while also having a ton of overlap. You have to ask yourself was it really worth it? How many fans of say, Jet 2.0 were there that he had episodes focused on him? Or that other Tenzin Daughter? What about Meelo? Did we really need to spend time including and seeing any of those three out being Old Republic Jedi?
At the end of the day, they don't matter, they really don't. Maybe Jinora, sure, but if you're going to give her time, give any none core character time, make sure it's on something that builds the character to a useful conclusion and contribution to the
end game or resolves their personal narrative. She got her tattoo last season, why is she getting kidnapped this season? Heck, why isn't it enough to see her growing as a person when it intersects with the main cast, and then have lesser characters showing up in the finale to highlight the organizational growth and maturation of the air benders as a whole?
You have 13 episodes of your finale season, ask yourself, whos' stories are the most important and what stories are only important enough to justify establishing in passing and cues throughout the season and the epilogue? When you spend stupid amounts of time inventing excuses for other meaningless characters 'something to do' (which doesn't even progress them as characters but are slavishly in service to resolving the plot context) but you then you actually waste valuable time showing it? More important characters get the shaft.
Speaking of:
But series 4's biggest weakness was Kuvira. I don't mean that in the sense that Kuvira was always doomed to be a terribly dull character, but the transformation of Kuvira to a power-hungry despot was handled terribly. It is fine for characters to evolve during a skip forward (or devolve if you go backwards, I guess) in time, if that evolution is in keeping with what we know of the characters beforehand; if a character has a change in personality that is not in keeping with what has been shown of them before, then the writers, directors etc. owe it to the audience to explain why this unexpected change has occurred. To me, it was never explained well enough how and why Kuvira went from being a captain of Zaofu's city guard (and member of Suyin's dance troupe) to an evil tyrant who imprisons anybody she disagrees with, and who attempts to subjugate or kill anyone who gets in her way.
Kuvira's struggles as a child could well have been a good reason for some of her excesses in power, if it had been given more time throughout the season to demonstrate why Kuvira did what she did for something she generally believed was for the greater good. But when you have a character who is throwing people in re-education camps because they are firebenders or waterbenders, then it takes more than a couple of sentences about how your parents didn't love you to make you a sympathetic villain.
Take Zaheer, for instance. Sure, he wanted to kill Korra in series 3, but that was in line with his core beliefs for a future where people were free of tyranny. Zaheer, rightly or wrongly, wanted a future where people were free to make their own choices without the restrictions placed, through laws and customs, by either an autocrat or an elected leader. The Avatar, as someone who can bend all four elements and go into the Avatar state, is, theoretically (although the events of Beginnings suggest that the idea of an "evil" reincarnation of Korra is impossible), an entity that has the means to impose their ideals onto others. Therefore, the concept of an Avatar clashed completely with Zaheer's vision of the ideal future, and so, in his mind, it was a necessary, if unpalatable, measure to take, and it is one that does not, in my opinion, render Zaheer a villain who is evil "for the sake of being evil".
Zaheer was a great villain, that hailed from the 'Sith' line of villainy even though he wasn't absolute evil. He had a singular mission and a justification for that mission. It wasn't complicated, so neither did he need to be, he simply needed to be a threat, look cool, and provide credible tension. 'True Freedom/Anarchy/End the Avatar cycle, done.
Ok shouldn't that have been Kuvira? 'Restore Earth Kingdom by any means necessary'.
Ok, but why 'by any means necessary'? How did you go from a captain of the guard and a dancer to this?
Unlike Zaheer, she doesn't come from a blank slate, we already know what her circumstance was before but in a way that left the viewer only being able to made educated guesses, THEN it's a time jump and we don't even get to see how she got from Season 3 to Season 4 all that well. Zaheer didn't need a complex character or to have complex motivations, but Kuvira did, especially because they kept pushing how callously and even needlessly evil she was, Zaheer was at least pushing some insane ideologue 'save the world as I see it' stuff, Kuvira came across as almost petty in comparison she didn't 'need' to do a lot of the terrible things she did, even completely ignoring the scale that both she and Zaheer were addressing.
Finally, with Korrasami, I have no problems with the idea of Korrasami (certainly better than going with Makorra after their incompatibility was showcased in season 2). What I do question, however, is whether we have seen enough interaction over the duration of the show to justify Korra and Asami developing romantic feelings for each other. I would say the same if they went for Makorra or Mako/Asami etc. Actually, I would go further and question whether enough over the show to demonstrate why Mako, Korra, Bolin and Asami are actually friends? Sure, Aang, Katara, Sokka and Toph met through luck and circumstance, but over the course of ATLA you can see why they become a close-knit group of friends. Personally, I can't say the same for their counterparts in Korra.
In the end every character seemed to get the shaft, when the story should have focused on Kuvira/Korra, especially Korra, yet Korra has the least screen time out of any season (I'm more than willing to bet). Because again, gotta show all those characters because they kept introducing characters as an attempt to fix the fact that they essentially nuked the relationships between the core Team Avatar in seasons 1-2 and never gave the properly closure to the issues that should have separated them so it all came out hollow.